There is much to learn from the great philosophers of old—Aristotle, Plato, Socrates, Voltaire, Balzac and Descartes—and if you listen carefully, there is also much to learn from our modern-day philosophers. The words of popular music in this last century are a treasure trove of insightful lessons for life.

Check these out:

Don’t let the sound of your own wheels drive you crazy – The Eagles

Freedom is just another word for nothing left to lose, nothing don’t mean nothin’ honey if it ain’t free – Janis Joplin and Kris Kristofferson

I’d rather be a hammer than a nail – Simon and Garfunkel

If we weren’t all crazy we would go insane – Jimmy Buffett

What the world needs now is love sweet love. It’s the only thing that there’s just too little of – Dionne Warwick

You got to know when to hold them, know when to fold them, know when to walk away and know when to run – Kenny Rogers

If I can see it, then I can do it; if I believe it, there’s nothing to it – R. Kelly